Did somebody know what are the main issue I you will need to face in this piece.
This work might well not be to everyone's taste, but then nor are the works of Bach, Beethoven and Chopin.
Who knows? Maybe Beethoven and Bach will fall the way of Obrecht and Ockeghem into semi-obscurity as new composers meet the ears of the slowly developing audience in 100 to 200 years from now.
Whilst it might be thought rude to answer a question with another question, the only sensible answer to "why?" would nevertheless appear to be "why not?". This work might well not be to everyone's taste, but then nor are the works of Bach, Beethoven and Chopin. It is considered the hardest piece ever written for the piano by those who consider it to be so. Were that to be everyone's view, why would anyone have prepared a typeset edition of its score and why would Tellef Johnson be preparing at his own expense a recording of it for what I understand to be imminent release? Thal's view of OC is not a value judgment but a personal statement that it does not accord to his taste in piano music, about which there is and indeed can be no problem; the pianist on that occasion (I was present myself) was Jonathan Powell who has given 10 public performances of it over the past 20 years - and I believe that even Thal held his performance in high regard, irrespective of his take on the music itself.
For me however, I sense Medieval music will fall by the wayside.